diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 08aef91b..9b908c6d 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -32,7 +32,7 @@ repos:
       - id: flake8
         name: flake8
         additional_dependencies:
-          - hacking>=3.0.1,<3.1.0
+          - hacking>=6.1.0,<6.2.0
         language: python
         entry: flake8
         files: '^.*\.py$'
diff --git a/oslo_utils/excutils.py b/oslo_utils/excutils.py
index 94a66552..f13bc175 100644
--- a/oslo_utils/excutils.py
+++ b/oslo_utils/excutils.py
@@ -138,7 +138,7 @@ def raise_with_cause(exc_cls, message, *args, **kwargs):
         finally:
             # Leave no references around (especially with regards to
             # tracebacks and any variables that it retains internally).
-            del(exc_type, exc, exc_tb)
+            del (exc_type, exc, exc_tb)
     raise exc_cls(message, *args, **kwargs) from kwargs.get('cause')
 
 
diff --git a/test-requirements.txt b/test-requirements.txt
index 6a284486..58fce9c4 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,8 +1,4 @@
-# The order of packages is significant, because pip processes them in the order
-# of appearance. Changing the order has an impact on the overall integration
-# process, which may cause wedges in the gate later.
-
-hacking>=3.0.1,<3.1.0 # Apache-2.0
+hacking>=6.1.0,<6.2.0 # Apache-2.0
 
 eventlet>=0.18.2,!=0.18.3,!=0.20.1,!=0.21.0,!=0.23.0 # MIT
 fixtures>=3.0.0 # Apache-2.0/BSD